Module documentation for 2.3.3

I hope for this library to become the standard colour library for Haskell.Most software does not properly blend colours because they fail togamma-correct the colours before blending. Hopefully by using this library,Haskell programs dealing with colour blending will avoid this problem.

There are some optimizing RULES pragmas that could be added to improvepreformance. If you are having performace issues with colour, pleaselet me know, and we will test some of these pragmas.

Bug reports and any patches are also welcome. Be warned, I haven'textensively tested this library yet.